Adjustable miter-box.



ADJUSTABLE MITER BOX.

APPLIOATIGN FILED FEB. 19, 1903.

N0 IODEL.

,4 ,j y 552:1 W A IN VEN TOR f2/ A TT ORNE Y [T SES: W

mja g Patented June 7', 1904.

PATENT OFFICE.

SAMUEL c-YRus BURR'IS, OF sEArrLE,WAs1'-11NGTON.

.ADJSTABLE MITER-B'ox.

SPECIFrcA'LIoN vfoaming parser Letters'ratent No. 761,817, dated June 7, 1904.

i a Application filed february 19, l903. Serial No. 144,157. (No model.)

- Toa/ZZ whom, 71.15 711417/ concern/ Beit known thatI, SAMUEL Crans BURRIS, a

citizen of theDominion of Canada, and a resi- ,dent of the city ofSeattle, vin the county of King .and State of Washington, have invented f certain new anduseful Improvementsin Adjustable'Mi'terfB'oXes, of which the yfollowing is aspecication. s

MyA invention relatesl to improvements in adjustable'miterfboxes, and has special yrefer-V .ence to a device of this class in which both the saw-guidesandWork-guides are adjustable.

4 Among numerous objects attained by this- 'invention and readily understood from the.

drawings, included asa part thereof, is the production of a simplified and eiiicientmiterboxembodying essential features of adaptar bility, utility, and adjustability, which widens the scope of operation and facilitates the Acutting of simple and complex bevel or miter .i01r1tS.. v The above-mentionedv and numerous other desirable objects are attained by the constructions, combinations, and arrangementsof parts as disclosed on thedrawings, set forth in this specification, andsuccinctly pointed v out in the appended claims. y

With reference to the drawings filed herewith and bearing like reference characters for corresponding parts throughout, Figure 1 is a view in perspective of my-improved miterbox, showing the saw-frame andwork-guides in adjusted position to make a cut for a complex joint. Fig. 2 1s a view inend Lelevation of the dev1ce,shovv1ng one of the carrier-guides of the saw-frame in broken section and "the base of the device disclosed in transvcrse's ection on line 2 2 of Fig. 1l viewed Aas, the arrows indicate. Fig. 3 is a View in perspective of'one of the saw-carriers removed from the device.

Fig. 4 is a view in transverse sec-- tions of one of the carrier-guides of 'the sawframe and shows the carrier therein and a` and an adjustable box-frame 12, consisting of a bottom section and a side section, the former section being arranged for tilting from the .horizontal and preferably composed of a plurality of Work-guides, as 14, -set parallel to each other .at the desired separation and arranged for .vertical adjustment at one end, so

that the bottom section "thus formed can be conveniently tilted from the horizontal. In the present embodiment 'the said sidesection is suitably arranged for vertical movement and is preferably composed ofa plurality of perpendicular Work-guides, as 15, set -i'n alinement and movably supported for vertical ad- .justmentfand as no-w considered' a bottom Work-guide 111 is suitably hinged at oneend to /each of thesev side Work-guides with the free end resting upon base 11 by'means of ahori- -zontally-disposed pivot, as-16,` secured in the upright substantially midway its length, so that these bottom guides can be conveniently adjusted or tilted to the desiredangle by moving the side guides verticallyand the upper end portions of these uprights made to serve as the side guides for-the work. vAs now considered these side guides comprise rectangular posts each of which is formed with a'longitudinally-disposed guideway,as 17, arranged in opposite side surfacesand adapted to slidably engage suitable oppositely-disposed Lfshaped guides, as 18, which are secured to a bracket, as'19, at suitable points to slidably support said posts at the desired separation.

This bracket 19 is preferably removably se cured at one side edge of the base-plate 11 and consists-vof a narrow section-of plate metal of considerable length and formed with oppositelydisposed laterally projecting lugs or ears, as 20, adjacent each end arranged at suitable separation to-'receive -the base-plate 11 snugly'therebetween, and -a set-screw or the like, as'.21, is seated in each of the bottom lugs in a transversely-disposed scre\vthread ed aperture, so that the bracket can be conveniently secured in place by tightening these screws against the under surface of the baseplatc, Fig. 2.

As now considered the side 'guides are adjusted or moved vertically by means of suitable racks 22 and pinions 23, the former being arranged on the outer side face of the lower half of the guides and the latter fixedly mounted in mesh with respective racks on a horizontally-disposed shaft, as 21, rotatably supported from the bracket 19 by suitable bearings 25, which are secured to the outer side surface thereof. This shaft is conveniently rotated in any suitable manner to raise or lower the side guides simultaneously, as by means of a pawl-and-ratchet contrivance 26 of any desired or ordinary construction, and graduation-marks, as 27, Fig. 2, are arranged along one edge of one of the side guides, by which the angle at which the bottom guides rest can be determined and the proper adjustment of these guides to support the work for a predetermined out thereby facilitated.

Embodied with the box proper is a pivotal-ly-mounted saw-frame, as 28, which is disposed substantially midway the length of the box and suitably mounted for adjustment in both a vertical and horizontal are, so that the saw can be thereby adjusted in two planes. As now considered this frame comprises a horizontally-disposed base 29, preferably composed of a round rod, and avertically-disposed carrier-guide, as 30, secured to said base adjacent each end thereofl and preferably consisting of a suitable head, as 31, havinga bore of suitable size to receive said base-rod, and a tubular stem, as 32, extending upwardly from said head and having` longitudinally-disposed blade-reeeiving slots 33 at diametrically opposite points in the wall. The base of this saw-fr ame is suitably rotatably mounted for adjustment throughout a vertical are by means of a bearing'or box, as 34, which is conveniently pivotally mounted on the bracket 19, so as to turn on a vertical axis, and thereby allow the frame to be swung or adjusted throughout a horizontal are, and as now considered this bearing comprises an eye of suit# able size to receive the base and formed with a downwardly-extending stem rotatably fitting in a vertically-disposed aperture formed in a lug, as 35, fixed to bracket 19, and a setscrew` as 36, is engaged in a suitable screwthreaded aperture in the wall of said lug, by which said bearing is conveniently secured in horizontally adjusted positions, and a setscrew,.as 37, is engaged in the wall of said eye to secure the frame in vertically-adjusted positions.

Adjacent the free end of the saw-frame a suitable steadier,as a movably-mounted guideblock 38, is conveniently arranged to carry said end of the frame, and as now considered this steadier is mounted on a suitable horizontally-disposed way, as 39, consisting of a fiat bar having grooves along the side edges, and this way is secured parallel with the bracket 19 at suitable separation therefrom by means of bars L10, disposed transversely the base-plate l1 adjacent each end and secured to the said bracket and the said way. rl`he guide-block 3S as now considered includes a base L11, formed with a donniwardlyprojecting L-shaped guide, as +19, on each side edge, arranged to engage in the grooves ol the way 39, and a bearing, as #1i-i, for the baserod 29 of the sav-frame, which is rotatably mounted on said base 11. The way 39, on which this steadiei' is mounted, is provided with suitable gradnation-marks, as 15, arranged radially with the axis of rotation ol' the bearing 31 and suitably disposed to indicate the proper position of the steadier to bring the saw-frame to a desired horizontal adjustment, and a set-screw l16 is arranged in the base Z11 of the steadier in a suitable pesition to impinge upon the way 39 when properly turned, and thereby conveniently clamp the steadier in adjusted positions.

In the pi'esent instance a suitable saw-carrier, as 16, is slidably engaged in the bore oll each of the carrier-guides 3Q, and as now considered these carriers each comprise oppositely-disposed parallel prongs L1i', which are approximately equal in length to the width of the saw-blade and are connected together atone end and formed withinwardly-projecting toes, as L18, at the free ends, which stand at suitable separation to receive the blade of the saw, as 19, snugly but freely therebetween and serve to prevent the saw from buckling in the eut. Adjacent the upper end ol each of these prongs an inwardly-projecting guide-pin, as 50, is suitably secured on the inner surface thereof, and the blade of the saw 419 is preferably formed with a longitudinally-disposed groove, as 51, disposed adjacent the top edge in one side surface and adapted to slidably receive the end portion of one of the guide-pins 50, so that the saw will be thereby supported on the carrier. These carriers are preferably rendered substantially rectangular, as viewed in cross-section, and the bores of the carrier-guides are shaped in conformity therewith, so that the carriers are thereby conveniently secured I'rom rotation in the guides, and as now considered the Saw 49 is provided with a suitable remor able handle 51 of any desired or nell-known form.

In the present instance the bottom workguides 11 are each formed with a shoe, as 52, at the free end, which is of suitable depth to cause the upper surface of the guide to rest in a plane above the base 29 of the smv-frame when the guide is brought to a true horizontal position, as indicated by dotted lilies in Fig.

2, so that the work will be supported clear ol` this base. This device is especially adapted for making cuts for simple and complex joints in roof-frames, and from the foregoing it will be understood that by adjusting or tilting the bottom section of the box the work is given the required tilt to cause the saw to pass therethrough at the proper angle to make IOO position, and the saw-frame can be adjusted in both a horizontal and vertical arc to guide the saw for angular cuts in making simple and complex joints.

It will of course be understood that graduations are provided by whichthe proper setting of the various adjustable parts of the device are determined to make cuts at predetermined angles and that the device is capable of making various forms of cuts without ref-i erence to graduations by simply marking the work and adjusting the device properly to cause the saw to pass through the work on these lines. y

An operation of the device to cut ahip-rafter for a roof of one-quarter pitch, for instance, would occur substantially as follows: rlhe bottom work-guides are brought to the required inclination to cause the stick of timbers to rest at the proper pitch, by reference to the graduation-marks 27, for the perpendicular cut, and the saw-frame is then adjusted in the horizontal arc to the proper graduation 45 to bring 'the saw to the required angle to make the side cut. The timber is then placed in position on the bottom work-guides, with one corner resting againstthe side work-guides,

and the saw is then passed through the timbers.

rIhis device is simple of construction, has few parts likely to get out of order, and embodies essential features of adjustability which give it a broad scope of operation.

Having thus described my invention, what I claim as new, and desire to secure by Letters` Patent of the United States of America, is-

1. In a miter-box, the combination with a horizontal base, of a saw-frame pivotally mounted on said base, a plurality of vertical work-guides arranged parallel to the normal vertical axis of the saw-frame, and supporting workguides connected to the vertical workguides, and means for adjusting the guides so as to tilt a timber about an axis parallel to the length thereof.

2. In a miter-box, the combination with a horizontal base.v of Va ysaw-frame pivotally mounted on said base, a plurality of yworkguides mounted upon the base, and means` for adjusting the guides so as lto tilt a timber about an axis parallel to the length thereof.

3. In a miter-box, the combination with a horizontal base, of a saw frame pivotally mounted on the base, a plurality of workguides supported upon the base, means for adjusting the guides so as to tilt a timber about an axis parallel to the length thereof, means for varying the vertical axis of the sawframe, and means for varying the horizontal axis of the saw-frame.

4. In a miter-box; the combination with a base; of a movable work-guiding section comprising a plurality of parallel bars slidably resting at one end on said base, and means to movably support the opposite ends of said bars for vertical adjustment.

5. In a miter-box; the combination with a base; of a side work-guidingsection movably mounted on said base for vertical adjustment, and a bottom work-guiding section slidably resting on said base and pivotally connected at one side to said side section.

6. In a miter-box; the combination with a base; ofa plurality of posts movably mounted on said base for vertical adjustment, and a plurality of horizontally-disposed bars pivotally connected at one end to said postsand slidably resting at the opposite ends on said base.

'7. In a miter-box; the combination with a base; of a post movably mounted on said base for vertical adjustment, a laterally-disposed bar pivoted at one end to said post and resting at the opposite end on said base, and means to raise and lower said post.

8. In a miter-box; the combination with a base; of a post movably mounted on said base for vertical adjustment, a rack fixed on the post, a gear engaged with said rack and rotatably supported on said base, and a laterally-disposed bar pivoted at one end to said post and resting at the opposite end on said base. j

9. Ina miter-box; the combination with a base; of a plurality7 of posts movably mountedl on said base for vertical adjustment, racksy fixed to the lower portions of the posts, gears meshing with said racks, a horizontally-dislposed shaft rotatably supported on said base and carrying said gears, a pawl-and-ratchet contrivance arranged to operate said shaft, and laterally-disposed bars pivotally connect-V ed at one endto said posts substantially midway their length and resting at the opposite ends on said base.

l0. IIn a ruiter-box, the combination with a saw-frame having vertically-disposed guides, of saw-carriers slidably mounted in said guides formed with saw-blade-cmbracing prongs, oppositely-disposed pins arranged on the inner surfaces of the prongs, and a saw-blade having a longitudinally-disposed pin-engaging groove in one sidel .thereof whereby it is supported and guided by the pins.

l1. In a miter-box, the combination with a saw-frame having vertically-disposed tubular guides formed with oppositely-disposed bladereceiving slots,of saw-carriers slidably mountedin said guides and formed with prongs having inturned toes, oppositely-disposed` pins on the inner side walls of the prongs, and a saw- IOO ISO

blade having a longitudinally-disposed pinengaging groove in one side thereof whereby the said blade may be passed entirely through the Work.

12. An adjustable miter-boX, comprising a base, a bracket removably attached to the base at one side,a pluralityof posts movably mounted on said bracket for vertical adjustment, racks along the lower portions of the posts, gears meshing with said racks, a shaft rotatably mounted on said bracket and carrying said gears, a pawl-and-ratchet contrivanee arranged to rotate said shaft, laterally-disposed bars pivotally connected at one end to said posts midway their length and slidably supported at the opposite end on said base, and a saw-frame pivotally mounted on said bracket for horizontal adjustment and arranged for adjustment on its mounting in a vertical are.

13. ln a ruiter-box; the combination of a base-plate, a saw-frame comprising a horizontally-disposed base-rod, and vertically-disposed guides on said base-rod having bladereceiving slots, a bearing pivotally mounted on said base for adjustment on a vertical axis and adapted to rotatably support said baserod, a guideway adjacent the outer end ot' said frame, a steadier for said frame adjustably mounted on said way, posts movably mounted at one side of said base for vertical adjustment, and laterally-disposed bars pivotally connected at one end to said posts and slidahl y resting at the opposite ends on said base-plate.

141. An adjustable miter-box comprising a base-plate, a bracket having` laterally-projeeting ears adapted to embrace one edge portion of said plate, a plurality of wolk-guiding posts inovably mounted on said bracket lor vertical adjustment, toothed racks along` one side el the lower portion et' said posts, gears meshing with said racks, a shaft rotatably mounted on said bracket and carrying said gears, a pawland-ratchet contrivance arranged to rotate said shaft, laterally-disposed hars pivotally connected at one end to said posts and having i 

